Types of Forces
This force pulls objects toward the center of the Earth.
Gravity
Two people push a box in the same direction with 5 N and 3 N of force. What is the net force?
8 N
Newton's First Law
This force opposes motion between 2 surfaces that are touching.
Friction
One person pushes a box to the right with 10 N, and another pushes to the left with 4 N. What is the net force?
6 N to the right.
This law explains why a heavier object requires more forces to accelerate.
Newtons Second Law
This force is either the attractive or repulsive force between magnets.
Magnetic Force
A box is being pulled with 15 N to the right and 15 N to the left. What is the net force? Is this balanced or unbalanced?
0 N (Balanced force)
This law is often summarized as "for every action, there is an equal and opposite reaction."
Newton's Third Law.
This contact force is when you exert a force on an object.
Applied Force
A student pushes a cart with 12 N forward, while friction resists with 7 N. What is the net force?
5 N forward
A soccer ball is sitting on the field. A player kicks it, and it rolls across the grass, gradually slowing down until it stops. Which of Newton's Laws explains why the ball eventually stops, and what force is responsible?
Newton's first Law, friction
Each sentence describes the effects of a force.
1. A Baseball Bat hits a baseball.
2. A tennis ball falling to the ground.
3. A paperclip being attracted to a magnet.
Identify which type of force is being shown in each sentence.
1. Applied Force
2. Gravity
3. Magnetism
A tug-of-war teams pulls with 25 N to the left, while the other teams pulls with 30 N to the right. What is the net force and direction.
5 N to the right
A rocket launches upwards. What newton's Law explains the downward thrust of the engine and the upward motion of the rocket?
Newton's Third Law.